ranks 14th in reading, 17th in science and 25th in math. how to fix the education system was front and center in chicago this month as teachers walked off the job over issues of longer school days, merit pay and teacher evaluations. education reform is an issue in the presidential campaign. president obama and his republican challenger, mitt romney, both favor expanding charter schools, support standardized tests and want more accountability from teachers and principals. but the two men have significant disagreements. >> i think some of the main differences between governor romney and president obama when it comes to education come in the area of school choice. governor romney sees a really robust rule for school choice and school improvement whereas president obama like a lot of democrats has been skeptical of vouchers. >> reporter: romney supports taking federal dollars for educating special needs and low income families, known as title i funds and giving them directly to parents in the form of vouchers. although romney avoids using that